3/(u-3)=5

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Solution for 3/(u-3)=5 equation: 


D( u )

u-3 = 0

u-3 = 0

u-3 = 0

u-3 = 0 // + 3

u = 3

u in (-oo:3) U (3:+oo)

3/(u-3) = 5 // - 5

3/(u-3)-5 = 0

3/(u-3)+(-5*(u-3))/(u-3) = 0

3-5*(u-3) = 0

18-5*u = 0

(18-5*u)/(u-3) = 0

(18-5*u)/(u-3) = 0 // * u-3

18-5*u = 0

18-5*u = 0 // - 18

-5*u = -18 // : -5

u = -18/(-5)

u = 18/5

u = 18/5

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